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hfs: get rid of hfs_sync_super
[linux/fpc-iii.git] / drivers / regulator / wm831x-ldo.c
bloba9a28d8ac18591d4c7126364dbd40197024191f8
1 /*
2 * wm831x-ldo.c -- LDO driver for the WM831x series
3 *
4 * Copyright 2009 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/bitops.h>
18 #include <linux/err.h>
19 #include <linux/i2c.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/slab.h>
23
24 #include <linux/mfd/wm831x/core.h>
25 #include <linux/mfd/wm831x/regulator.h>
26 #include <linux/mfd/wm831x/pdata.h>
27
28 #define WM831X_LDO_MAX_NAME 9
29
30 #define WM831X_LDO_CONTROL 0
31 #define WM831X_LDO_ON_CONTROL 1
32 #define WM831X_LDO_SLEEP_CONTROL 2
33
34 #define WM831X_ALIVE_LDO_ON_CONTROL 0
35 #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1
36
37 struct wm831x_ldo {
38 char name[WM831X_LDO_MAX_NAME];
39 char supply_name[WM831X_LDO_MAX_NAME];
40 struct regulator_desc desc;
41 int base;
42 struct wm831x *wm831x;
43 struct regulator_dev *regulator;
44 };
45
46 /*
47 * Shared
48 */
49
50 static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
51 {
52 struct wm831x_ldo *ldo = data;
53
54 regulator_notifier_call_chain(ldo->regulator,
55 REGULATOR_EVENT_UNDER_VOLTAGE,
56 NULL);
57
58 return IRQ_HANDLED;
59 }
60
61 /*
62 * General purpose LDOs
63 */
64
65 #define WM831X_GP_LDO_SELECTOR_LOW 0xe
66 #define WM831X_GP_LDO_MAX_SELECTOR 0x1f
67
68 static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
69 unsigned int selector)
70 {
71 /* 0.9-1.6V in 50mV steps */
72 if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
73 return 900000 + (selector * 50000);
74 /* 1.7-3.3V in 100mV steps */
75 if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
76 return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
77 * 100000);
78 return -EINVAL;
79 }
80
81 static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg,
82 int min_uV, int max_uV,
83 unsigned *selector)
84 {
85 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
86 struct wm831x *wm831x = ldo->wm831x;
87 int vsel, ret;
88
89 if (min_uV < 900000)
90 vsel = 0;
91 else if (min_uV < 1700000)
92 vsel = ((min_uV - 900000) / 50000);
93 else
94 vsel = ((min_uV - 1700000) / 100000)
95 + WM831X_GP_LDO_SELECTOR_LOW + 1;
96
97 ret = wm831x_gp_ldo_list_voltage(rdev, vsel);
98 if (ret < 0)
99 return ret;
100 if (ret < min_uV || ret > max_uV)
101 return -EINVAL;
102
103 *selector = vsel;
104
105 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel);
106 }
107
108 static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev,
109 int min_uV, int max_uV,
110 unsigned *selector)
111 {
112 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
113 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
114
115 return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
116 selector);
117 }
118
119 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
120 int uV)
121 {
122 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
123 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
124 unsigned int selector;
125
126 return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
127 }
128
129 static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
130 {
131 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
132 struct wm831x *wm831x = ldo->wm831x;
133 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
134 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
135 int ret;
136
137 ret = wm831x_reg_read(wm831x, on_reg);
138 if (ret < 0)
139 return ret;
140
141 if (!(ret & WM831X_LDO1_ON_MODE))
142 return REGULATOR_MODE_NORMAL;
143
144 ret = wm831x_reg_read(wm831x, ctrl_reg);
145 if (ret < 0)
146 return ret;
147
148 if (ret & WM831X_LDO1_LP_MODE)
149 return REGULATOR_MODE_STANDBY;
150 else
151 return REGULATOR_MODE_IDLE;
152 }
153
154 static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
155 unsigned int mode)
156 {
157 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
158 struct wm831x *wm831x = ldo->wm831x;
159 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
160 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
161 int ret;
162
163
164 switch (mode) {
165 case REGULATOR_MODE_NORMAL:
166 ret = wm831x_set_bits(wm831x, on_reg,
167 WM831X_LDO1_ON_MODE, 0);
168 if (ret < 0)
169 return ret;
170 break;
171
172 case REGULATOR_MODE_IDLE:
173 ret = wm831x_set_bits(wm831x, ctrl_reg,
174 WM831X_LDO1_LP_MODE, 0);
175 if (ret < 0)
176 return ret;
177
178 ret = wm831x_set_bits(wm831x, on_reg,
179 WM831X_LDO1_ON_MODE,
180 WM831X_LDO1_ON_MODE);
181 if (ret < 0)
182 return ret;
183 break;
184
185 case REGULATOR_MODE_STANDBY:
186 ret = wm831x_set_bits(wm831x, ctrl_reg,
187 WM831X_LDO1_LP_MODE,
188 WM831X_LDO1_LP_MODE);
189 if (ret < 0)
190 return ret;
191
192 ret = wm831x_set_bits(wm831x, on_reg,
193 WM831X_LDO1_ON_MODE,
194 WM831X_LDO1_ON_MODE);
195 if (ret < 0)
196 return ret;
197 break;
198
199 default:
200 return -EINVAL;
201 }
202
203 return 0;
204 }
205
206 static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
207 {
208 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
209 struct wm831x *wm831x = ldo->wm831x;
210 int mask = 1 << rdev_get_id(rdev);
211 int ret;
212
213 /* Is the regulator on? */
214 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
215 if (ret < 0)
216 return ret;
217 if (!(ret & mask))
218 return REGULATOR_STATUS_OFF;
219
220 /* Is it reporting under voltage? */
221 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
222 if (ret & mask)
223 return REGULATOR_STATUS_ERROR;
224
225 ret = wm831x_gp_ldo_get_mode(rdev);
226 if (ret < 0)
227 return ret;
228 else
229 return regulator_mode_to_status(ret);
230 }
231
232 static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
233 int input_uV,
234 int output_uV, int load_uA)
235 {
236 if (load_uA < 20000)
237 return REGULATOR_MODE_STANDBY;
238 if (load_uA < 50000)
239 return REGULATOR_MODE_IDLE;
240 return REGULATOR_MODE_NORMAL;
241 }
242
243
244 static struct regulator_ops wm831x_gp_ldo_ops = {
245 .list_voltage = wm831x_gp_ldo_list_voltage,
246 .get_voltage_sel = regulator_get_voltage_sel_regmap,
247 .set_voltage = wm831x_gp_ldo_set_voltage,
248 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
249 .get_mode = wm831x_gp_ldo_get_mode,
250 .set_mode = wm831x_gp_ldo_set_mode,
251 .get_status = wm831x_gp_ldo_get_status,
252 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
253
254 .is_enabled = regulator_is_enabled_regmap,
255 .enable = regulator_enable_regmap,
256 .disable = regulator_disable_regmap,
257 };
258
259 static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
260 {
261 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
262 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
263 struct regulator_config config = { };
264 int id;
265 struct wm831x_ldo *ldo;
266 struct resource *res;
267 int ret, irq;
268
269 if (pdata && pdata->wm831x_num)
270 id = (pdata->wm831x_num * 10) + 1;
271 else
272 id = 0;
273 id = pdev->id - id;
274
275 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
276
277 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
278 if (ldo == NULL) {
279 dev_err(&pdev->dev, "Unable to allocate private data\n");
280 return -ENOMEM;
281 }
282
283 ldo->wm831x = wm831x;
284
285 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
286 if (res == NULL) {
287 dev_err(&pdev->dev, "No I/O resource\n");
288 ret = -EINVAL;
289 goto err;
290 }
291 ldo->base = res->start;
292
293 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
294 ldo->desc.name = ldo->name;
295
296 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
297 "LDO%dVDD", id + 1);
298 ldo->desc.supply_name = ldo->supply_name;
299
300 ldo->desc.id = id;
301 ldo->desc.type = REGULATOR_VOLTAGE;
302 ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
303 ldo->desc.ops = &wm831x_gp_ldo_ops;
304 ldo->desc.owner = THIS_MODULE;
305 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
306 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
307 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
308 ldo->desc.enable_mask = 1 << id;
309
310 config.dev = pdev->dev.parent;
311 if (pdata)
312 config.init_data = pdata->ldo[id];
313 config.driver_data = ldo;
314 config.regmap = wm831x->regmap;
315
316 ldo->regulator = regulator_register(&ldo->desc, &config);
317 if (IS_ERR(ldo->regulator)) {
318 ret = PTR_ERR(ldo->regulator);
319 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
320 id + 1, ret);
321 goto err;
322 }
323
324 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
325 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
326 IRQF_TRIGGER_RISING, ldo->name,
327 ldo);
328 if (ret != 0) {
329 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
330 irq, ret);
331 goto err_regulator;
332 }
333
334 platform_set_drvdata(pdev, ldo);
335
336 return 0;
337
338 err_regulator:
339 regulator_unregister(ldo->regulator);
340 err:
341 return ret;
342 }
343
344 static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
345 {
346 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
347
348 platform_set_drvdata(pdev, NULL);
349
350 free_irq(wm831x_irq(ldo->wm831x,
351 platform_get_irq_byname(pdev, "UV")), ldo);
352 regulator_unregister(ldo->regulator);
353
354 return 0;
355 }
356
357 static struct platform_driver wm831x_gp_ldo_driver = {
358 .probe = wm831x_gp_ldo_probe,
359 .remove = __devexit_p(wm831x_gp_ldo_remove),
360 .driver = {
361 .name = "wm831x-ldo",
362 .owner = THIS_MODULE,
363 },
364 };
365
366 /*
367 * Analogue LDOs
368 */
369
370
371 #define WM831X_ALDO_SELECTOR_LOW 0xc
372 #define WM831X_ALDO_MAX_SELECTOR 0x1f
373
374 static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
375 unsigned int selector)
376 {
377 /* 1-1.6V in 50mV steps */
378 if (selector <= WM831X_ALDO_SELECTOR_LOW)
379 return 1000000 + (selector * 50000);
380 /* 1.7-3.5V in 100mV steps */
381 if (selector <= WM831X_ALDO_MAX_SELECTOR)
382 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
383 * 100000);
384 return -EINVAL;
385 }
386
387 static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
388 int min_uV, int max_uV,
389 unsigned *selector)
390 {
391 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
392 struct wm831x *wm831x = ldo->wm831x;
393 int vsel, ret;
394
395 if (min_uV < 1000000)
396 vsel = 0;
397 else if (min_uV < 1700000)
398 vsel = ((min_uV - 1000000) / 50000);
399 else
400 vsel = ((min_uV - 1700000) / 100000)
401 + WM831X_ALDO_SELECTOR_LOW + 1;
402
403 ret = wm831x_aldo_list_voltage(rdev, vsel);
404 if (ret < 0)
405 return ret;
406 if (ret < min_uV || ret > max_uV)
407 return -EINVAL;
408
409 *selector = vsel;
410
411 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
412 }
413
414 static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
415 int min_uV, int max_uV, unsigned *selector)
416 {
417 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
418 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
419
420 return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV,
421 selector);
422 }
423
424 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
425 int uV)
426 {
427 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
428 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
429 unsigned int selector;
430
431 return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector);
432 }
433
434 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
435 {
436 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
437 struct wm831x *wm831x = ldo->wm831x;
438 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
439 int ret;
440
441 ret = wm831x_reg_read(wm831x, on_reg);
442 if (ret < 0)
443 return 0;
444
445 if (ret & WM831X_LDO7_ON_MODE)
446 return REGULATOR_MODE_IDLE;
447 else
448 return REGULATOR_MODE_NORMAL;
449 }
450
451 static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
452 unsigned int mode)
453 {
454 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
455 struct wm831x *wm831x = ldo->wm831x;
456 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
457 int ret;
458
459
460 switch (mode) {
461 case REGULATOR_MODE_NORMAL:
462 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
463 if (ret < 0)
464 return ret;
465 break;
466
467 case REGULATOR_MODE_IDLE:
468 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
469 WM831X_LDO7_ON_MODE);
470 if (ret < 0)
471 return ret;
472 break;
473
474 default:
475 return -EINVAL;
476 }
477
478 return 0;
479 }
480
481 static int wm831x_aldo_get_status(struct regulator_dev *rdev)
482 {
483 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
484 struct wm831x *wm831x = ldo->wm831x;
485 int mask = 1 << rdev_get_id(rdev);
486 int ret;
487
488 /* Is the regulator on? */
489 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
490 if (ret < 0)
491 return ret;
492 if (!(ret & mask))
493 return REGULATOR_STATUS_OFF;
494
495 /* Is it reporting under voltage? */
496 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
497 if (ret & mask)
498 return REGULATOR_STATUS_ERROR;
499
500 ret = wm831x_aldo_get_mode(rdev);
501 if (ret < 0)
502 return ret;
503 else
504 return regulator_mode_to_status(ret);
505 }
506
507 static struct regulator_ops wm831x_aldo_ops = {
508 .list_voltage = wm831x_aldo_list_voltage,
509 .get_voltage_sel = regulator_get_voltage_sel_regmap,
510 .set_voltage = wm831x_aldo_set_voltage,
511 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
512 .get_mode = wm831x_aldo_get_mode,
513 .set_mode = wm831x_aldo_set_mode,
514 .get_status = wm831x_aldo_get_status,
515
516 .is_enabled = regulator_is_enabled_regmap,
517 .enable = regulator_enable_regmap,
518 .disable = regulator_disable_regmap,
519 };
520
521 static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
522 {
523 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
524 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
525 struct regulator_config config = { };
526 int id;
527 struct wm831x_ldo *ldo;
528 struct resource *res;
529 int ret, irq;
530
531 if (pdata && pdata->wm831x_num)
532 id = (pdata->wm831x_num * 10) + 1;
533 else
534 id = 0;
535 id = pdev->id - id;
536
537 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
538
539 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
540 if (ldo == NULL) {
541 dev_err(&pdev->dev, "Unable to allocate private data\n");
542 return -ENOMEM;
543 }
544
545 ldo->wm831x = wm831x;
546
547 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
548 if (res == NULL) {
549 dev_err(&pdev->dev, "No I/O resource\n");
550 ret = -EINVAL;
551 goto err;
552 }
553 ldo->base = res->start;
554
555 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
556 ldo->desc.name = ldo->name;
557
558 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
559 "LDO%dVDD", id + 1);
560 ldo->desc.supply_name = ldo->supply_name;
561
562 ldo->desc.id = id;
563 ldo->desc.type = REGULATOR_VOLTAGE;
564 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
565 ldo->desc.ops = &wm831x_aldo_ops;
566 ldo->desc.owner = THIS_MODULE;
567 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
568 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
569 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
570 ldo->desc.enable_mask = 1 << id;
571
572 config.dev = pdev->dev.parent;
573 if (pdata)
574 config.init_data = pdata->ldo[id];
575 config.driver_data = ldo;
576 config.regmap = wm831x->regmap;
577
578 ldo->regulator = regulator_register(&ldo->desc, &config);
579 if (IS_ERR(ldo->regulator)) {
580 ret = PTR_ERR(ldo->regulator);
581 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
582 id + 1, ret);
583 goto err;
584 }
585
586 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
587 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
588 IRQF_TRIGGER_RISING, ldo->name, ldo);
589 if (ret != 0) {
590 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
591 irq, ret);
592 goto err_regulator;
593 }
594
595 platform_set_drvdata(pdev, ldo);
596
597 return 0;
598
599 err_regulator:
600 regulator_unregister(ldo->regulator);
601 err:
602 return ret;
603 }
604
605 static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
606 {
607 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
608
609 free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")),
610 ldo);
611 regulator_unregister(ldo->regulator);
612
613 return 0;
614 }
615
616 static struct platform_driver wm831x_aldo_driver = {
617 .probe = wm831x_aldo_probe,
618 .remove = __devexit_p(wm831x_aldo_remove),
619 .driver = {
620 .name = "wm831x-aldo",
621 .owner = THIS_MODULE,
622 },
623 };
624
625 /*
626 * Alive LDO
627 */
628
629 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
630
631 static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev,
632 int reg,
633 int min_uV, int max_uV,
634 unsigned *selector)
635 {
636 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
637 struct wm831x *wm831x = ldo->wm831x;
638 int vsel, ret;
639
640 vsel = (min_uV - 800000) / 50000;
641
642 ret = regulator_list_voltage_linear(rdev, vsel);
643 if (ret < 0)
644 return ret;
645 if (ret < min_uV || ret > max_uV)
646 return -EINVAL;
647
648 *selector = vsel;
649
650 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel);
651 }
652
653 static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev,
654 int min_uV, int max_uV,
655 unsigned *selector)
656 {
657 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
658 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
659
660 return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
661 selector);
662 }
663
664 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
665 int uV)
666 {
667 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
668 int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
669 unsigned selector;
670
671 return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
672 }
673
674 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
675 {
676 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
677 struct wm831x *wm831x = ldo->wm831x;
678 int mask = 1 << rdev_get_id(rdev);
679 int ret;
680
681 /* Is the regulator on? */
682 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
683 if (ret < 0)
684 return ret;
685 if (ret & mask)
686 return REGULATOR_STATUS_ON;
687 else
688 return REGULATOR_STATUS_OFF;
689 }
690
691 static struct regulator_ops wm831x_alive_ldo_ops = {
692 .list_voltage = regulator_list_voltage_linear,
693 .get_voltage_sel = regulator_get_voltage_sel_regmap,
694 .set_voltage = wm831x_alive_ldo_set_voltage,
695 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
696 .get_status = wm831x_alive_ldo_get_status,
697
698 .is_enabled = regulator_is_enabled_regmap,
699 .enable = regulator_enable_regmap,
700 .disable = regulator_disable_regmap,
701 };
702
703 static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
704 {
705 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
706 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
707 struct regulator_config config = { };
708 int id;
709 struct wm831x_ldo *ldo;
710 struct resource *res;
711 int ret;
712
713 if (pdata && pdata->wm831x_num)
714 id = (pdata->wm831x_num * 10) + 1;
715 else
716 id = 0;
717 id = pdev->id - id;
718
719
720 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
721
722 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
723 if (ldo == NULL) {
724 dev_err(&pdev->dev, "Unable to allocate private data\n");
725 return -ENOMEM;
726 }
727
728 ldo->wm831x = wm831x;
729
730 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
731 if (res == NULL) {
732 dev_err(&pdev->dev, "No I/O resource\n");
733 ret = -EINVAL;
734 goto err;
735 }
736 ldo->base = res->start;
737
738 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
739 ldo->desc.name = ldo->name;
740
741 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
742 "LDO%dVDD", id + 1);
743 ldo->desc.supply_name = ldo->supply_name;
744
745 ldo->desc.id = id;
746 ldo->desc.type = REGULATOR_VOLTAGE;
747 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
748 ldo->desc.ops = &wm831x_alive_ldo_ops;
749 ldo->desc.owner = THIS_MODULE;
750 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
751 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
752 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
753 ldo->desc.enable_mask = 1 << id;
754 ldo->desc.min_uV = 800000;
755 ldo->desc.uV_step = 50000;
756
757 config.dev = pdev->dev.parent;
758 if (pdata)
759 config.init_data = pdata->ldo[id];
760 config.driver_data = ldo;
761 config.regmap = wm831x->regmap;
762
763 ldo->regulator = regulator_register(&ldo->desc, &config);
764 if (IS_ERR(ldo->regulator)) {
765 ret = PTR_ERR(ldo->regulator);
766 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
767 id + 1, ret);
768 goto err;
769 }
770
771 platform_set_drvdata(pdev, ldo);
772
773 return 0;
774
775 err:
776 return ret;
777 }
778
779 static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
780 {
781 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
782
783 regulator_unregister(ldo->regulator);
784
785 return 0;
786 }
787
788 static struct platform_driver wm831x_alive_ldo_driver = {
789 .probe = wm831x_alive_ldo_probe,
790 .remove = __devexit_p(wm831x_alive_ldo_remove),
791 .driver = {
792 .name = "wm831x-alive-ldo",
793 .owner = THIS_MODULE,
794 },
795 };
796
797 static int __init wm831x_ldo_init(void)
798 {
799 int ret;
800
801 ret = platform_driver_register(&wm831x_gp_ldo_driver);
802 if (ret != 0)
803 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
804
805 ret = platform_driver_register(&wm831x_aldo_driver);
806 if (ret != 0)
807 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
808
809 ret = platform_driver_register(&wm831x_alive_ldo_driver);
810 if (ret != 0)
811 pr_err("Failed to register WM831x alive LDO driver: %d\n",
812 ret);
813
814 return 0;
815 }
816 subsys_initcall(wm831x_ldo_init);
817
818 static void __exit wm831x_ldo_exit(void)
819 {
820 platform_driver_unregister(&wm831x_alive_ldo_driver);
821 platform_driver_unregister(&wm831x_aldo_driver);
822 platform_driver_unregister(&wm831x_gp_ldo_driver);
823 }
824 module_exit(wm831x_ldo_exit);
825
826 /* Module information */
827 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
828 MODULE_DESCRIPTION("WM831x LDO driver");
829 MODULE_LICENSE("GPL");
830 MODULE_ALIAS("platform:wm831x-ldo");
831 MODULE_ALIAS("platform:wm831x-aldo");
832 MODULE_ALIAS("platform:wm831x-aliveldo");
Linux with added FPC-III support